Insulator



Feb. 24. 1925. 1,527,318

E. LEWIS m unnon Filed Aug. 10, 1921 awuwtoz Edwin/lazuli;

93M Swen w Patented Feb, 24, 1925.

UNITED STATES "PATENT OFFICE.

EDWIN LEWIS, or New Young R. Y., ASSIGNOR 'ro amnmcan' TELEPHONE ANDTnLEonArn COMPANY, A conrona'rrou on NEW Yonx.

INSULATOR.

Application filed August 10, 1921. Serial No. 491,189.

"T 0 all 11:71am. it may concern:

Be it known that I, EDWIN LEWIS, residing at New York, in the county ofNew York and State of New York. have invented certain Improvements inInsulators, of which the following is a specification.

This invention relates to insulators, and

more particularly to that class used in connection with Wires for thetransmission of electrical currents.

For the purpose of connecting electrical conductors in buildings withelectrical transmission conductors carried on poles, drop wires areconnected with the transmission conductors at the poles and strung toinsulators afiixed to the outer building walls. The drop wires are thencarried along said walls on other insulators to entering points in saidbuildings, and connected with the interior wiring in a wellknown manner.In many cases it is necessary that the insulators be mounted on supportsto permit the connection of the drop wires therewith because of theangular positionof the poles with respect to the insulators, and it iscustomary practice to em I ploy such supports as L-shaped brackets, or

the like, in order to properly position the insulators to receive thedrop wires. This practice involves considerable expense in the use ofsuch brackets or other equipment in connection with the insulators. asWell as time-consuming operations required for their installation.Accordingly, it is an object of this invention to provide an insulatoradapted for the direct attachment of the drop wires thereto without theaid of brackets or other equipment, and regardless of the position ofthe pole with respect to said insulator. Other and further objects ofthe invention will hereinafter appear.

In the accompanying drawing, in which is illustrated one embodiment ofthe invention, Figure 1 is 'a top-plan view of the improved insulator,Fig. 2 is a side elevation thereof, and Fig. 3 is also a side elevationof the device turned at an angle of 90 degrees from the view shown inFig. 2.

Referring to the drawing, 5 represents an insulator which may becomposed of any suitable insulating substance, such as porcelain, glass,or the like. The insulator 5 has a pair of grooves 6, 7, which are adated to receive a pair of conductors or op wires. The grooves 6 and '7extend circumferentially about the surface of said insulator, vand aseparating wall 8 is provided between said grooves. The wall 8 extendsonly partly about the surface of the insulator and is divided into twosegments,

the terminating edges of said segments be- .of conductors in theirpassage from grooves 6 and 12 to grooves 21 and 7, respectively.

A pair of grooves 12 and 13 are formed on the top surface of theinsulator 5 and between said grooves is provided a surface '14, in thepresent instance being indicated as of a general elliptical form, asshown in Fig. 1. The ends of the surface 14 are cut away at an angle asindicated at 15 and 16, to correspond to the edges 9, 9 of the wall 8and also the edges of the lugs 10 and 11. Formed at the outer edges ofthe grooves 12 and 13 are semi-elliptical surfaces 17, 17 from whichvertical walls 18 extend downwardly and terminate at the upper portionsor edges of the groove 6.

The lower portion of the insulator 5 is provided with surfaces 19, 19,which extend upwardly at an angle of approximately15 degrees andterminate in a pair of grooves 20 and 21, said grooves, being separatedfrom the grooves 7, 7 by walls 22, 22. The grooves 20 and 21 are adaptedto co-operate with the grooves 12 and 13, respectively,

while the grooves 6 and 12 are adapted to co-' operate with the grooves21 and 7, respective- 1y, in connecting or seating and retainingelectrical conductors or drop wires. Formed at the ends of the surfaces19, 19 are shoulders 23 which serve to position the drop wires undercertain conditions. An aperture 24, extending through the center of theinsulator 5 and terminating in a countersunk portion 25 on the surface14, is provided for the reception of a screw 26 which serves to securethe insulator in position.

In practice. the insulator is secured to the building wall in an obviousmanner and the drop wires are strung from the pole and at the anglecorresponding to the inclination of the drop wires.

It will be seen that the use of this improved insulator eliminates theneed of supplementary equipment in connection therewith and therebyefi'ects considerable sav- %Vhile there is shown and described hereinone preferred form of the invention by way of illustration, it isunderstood that it is not limited or confined to the precise details ofconstruction herein described ,and detailed, as modification andvariation may be made within the scope of the claims without departingfrom the spirit of the invention.

What is claimed is; r

1. An insulator having a pair of grooves extending circumferentiallythereof, a second pair of grooves extending across one end of saidinsulator, a third pair of grooves extending acrossthe opposite end ofsaid insulator in the same direction as said second pair of grooves, oneof the pair of said circumferential grooves and one of the pair ofsecond mentioned grooves being adapted to co-operate with one of thepair of the third mentioned grooves and one of the pair of the saidsecond mentioned pair of grooves respectively for the connection ofelectrical conductors, the pair of said second'and said third mentionedgrooves being also adapted to co-operate with each other for theconnection of conductors.

2. An insulator having a pair of grooves extending circumferentiallythereof, a second pair of grooves extending across one end of saidinsulator, a third pair of grooves extending across the opposite end ofsaid insulator in the same direction as said second pair of grooves,said circumferential grooves being adapted for the connection ofelectrical conductors thereto at an angle of 90 with respect to the axisof said 1nsulator, oneof the pair of circumferential grooves and one ofthepair of said second mentioned grooves -co-operating respectively.with one of the pair of the third mentioned grooves and one of the pairof the circumferential grooves for the connection of conductors theretoat an angle of 45, and the pairs of said second and saidthird mentionedgrooves being adapted to co-operate with eachother for the connectionthereto of conductors extending parallel to said axis; 1 w

In testimony whereof, I have signed my name to this specification thisfifth day of August, 1921.

I EDWIN LEWIS.

